from django.contrib.auth.backends import ModelBackend
import  re
from users.models import User

class MyAuthenticateBackend(ModelBackend):
    def authenticate(self, request, username=None, password=None, **kwargs):
        try:
            #1.判断username是否有手机号
            if re.match(r'^1[3-9]\d{9}$',username):
                user = User.objects.get(mobile=username)
            else:
                #2.否则便用
                user = User.objects.get(username=username)
        except User.DoesNotExist:
            return  None
        if user.check_password(password):

            return user